package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordEditFailedException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;


import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // TODO 后期需要进行md5加密，然后再进行比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    @Override
    public PageResult getEmpPage(EmployeePageQueryDTO employeePageQueryDTO) {
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());
        List<Employee> list = employeeMapper.selectEmpPage(employeePageQueryDTO);
        Page<Employee> p = (Page<Employee>) list;
        return new PageResult(p.getTotal(),p.getResult());
    }

    @Override
    public void saveEmp(EmployeeDTO employeeDTO) {
        // 创建一个Employee对象
        Employee employee = new Employee();

        // 使用BeanUtils工具类将employeeDTO中的属性值复制到employee对象中
        BeanUtils.copyProperties(employeeDTO,employee);

        // 设置employee的密码，使用MD5加密默认密码
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));

        // 设置employee的状态为启用
        employee.setStatus(StatusConstant.ENABLE);

        // 设置employee的创建时间为当前时间
//        employee.setCreateTime(LocalDateTime.now());

        // 设置employee的更新时间为当前时间
//        employee.setUpdateTime(LocalDateTime.now());

        // 设置employee的创建用户ID为当前登录用户ID
//        employee.setCreateUser(BaseContext.getCurrentId());

        // 设置employee的更新用户ID为当前登录用户ID
//        employee.setUpdateUser(BaseContext.getCurrentId());

        // 调用employeeMapper的saveEmp方法保存employee对象到数据库
        employeeMapper.saveEmp(employee);
    }

    @Override
    public Employee selectById(Long id) {
        return employeeMapper.selectById(id);
    }

    @Override
    public void updateEmp(Employee employee) {
        employee.setUpdateTime(LocalDateTime.now());
        employee.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.updateEmp(employee);
    }

    @Override
    public void startOrStop(Integer status, Long id) {
        employeeMapper.startOrStop(status,id);
    }

    @Override
    public int updatePassword(PasswordEditDTO passwordEditDTO) {
        String newPassword = DigestUtils.md5DigestAsHex(passwordEditDTO.getNewPassword().getBytes());
        passwordEditDTO.setNewPassword(newPassword);
        String oldPassword = DigestUtils.md5DigestAsHex(passwordEditDTO.getOldPassword().getBytes());
        passwordEditDTO.setOldPassword(newPassword);
        passwordEditDTO.setOldPassword(oldPassword);
        passwordEditDTO.setEmpId(BaseContext.getCurrentId());
        int i = employeeMapper.updatePassword(passwordEditDTO);
        if(i==0){
            throw new PasswordEditFailedException(MessageConstant.PASSWORD_EDIT_FAILED);
        }
        return i;
    }
}
